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A Study on the Applicability of the Memory-Based Reasoning Classifier
Beibei Luo,진서훈,최종후 한국자료분석학회 2013 Journal of the Korean Data Analysis Society Vol.15 No.1
In recent year, many methods suitable for classification problems have been extended to include a range of popular techniques, such as neural networks, logistic regression and decision tree induction. Unlike other data mining techniques that use a training set of preclassified data to create a model and then discard the training set, for MBR (memory- based reasoning), the training set essentially is the model. This study gives a way on the memory-based reasoning, decision tree, logistic regression, neural networks and bagging model comparison methods for home equity lines of credit data using 1:1, 1:2, 1:3 and 1:4 target rate datamarts. Through the reasoning underlying their development, MBR classifier can also be a good choice to make a prediction. The proper k for MBR classifier is selected based on the minimum misclassification rate criterion. Under the proper k, we found that the performance of MBR dominated other classification technique for the data set that we analyzed.
Yang, Yankang,Qiu, Beibei,Chen, Shanshan,Zhou, Qiuju,Peng, Ying,Zhang, Zhi-Guo,Yao, Jia,Luo, Zhenghui,Chen, Xiaofeng,Xue, Lingwei,Feng, Liuliu,Yang, Changduk,Li, Yongfang The Royal Society of Chemistry 2018 Journal of materials chemistry. A, Materials for e Vol.6 No.20
<P>Solution-processed organic solar cells (OSCs) have been attracting more and more attention for a series of well-known advantages, and power conversion efficiencies (PCEs) of over 11% have been reported. However, the highest PCE of the OSCs based on small molecule donor/polymer acceptor blends is only 4.82%, which was much lower than those of other types of OSCs due to weak absorption of the polymer acceptor and the unbalanced charge carrier mobility of the small molecule donor and the polymer acceptor. Here, we fabricated small molecule donor/polymer acceptor-based OSCs using the wide bandgap SM1 and DR3TBDTT as the small molecular donor and the low-bandgap n-type conjugated polymer PZ1 as the polymer acceptor. With the treatment of a solvent additive, which can promote the absorption intensity, enhance the carrier mobility and suppress the charge carrier recombination, the SM1-based devices and the DR3TBDTT-based devices show PCEs of 3.97% and 5.86%, respectively. It is worth mentioning that the PCE of 5.86% is the state-of-the-art efficiency for OSCs based on the small molecular donor/polymer acceptor system.</P>